21822200447 has 2 divisors, whose sum is σ = 21822200448. Its totient is φ = 21822200446.

The previous prime is 21822200371. The next prime is 21822200471. The reversal of 21822200447 is 74400222812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21822200447 - 2¹² = 21822196351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21822200947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10911100223 + 10911100224.

It is an arithmetic number, because the mean of its divisors is an integer number (10911100224).

Almost surely, 2^21822200447 is an apocalyptic number.

21822200447 is a deficient number, since it is larger than the sum of its proper divisors (1).

21822200447 is an equidigital number, since it uses as much as digits as its factorization.

21822200447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 32.

The spelling of 21822200447 in words is "twenty-one billion, eight hundred twenty-two million, two hundred thousand, four hundred forty-seven".